Cutting tool



Jan. 21, 1964 BALZ 3,118,226

CUTTING TOOL Filed Aug. 5, 1961 t a a a.

I NVENTOR.

BARRY E. BALZ ATTORNEY United States Patent 3,118,226 CUi'lnWG TOUL Barry E. Bale, 595 NW. 97th St, Miami, Fla. Filed Aug. 3, 1961, Ser. No. 129,1b3 5 Qlaims. (Cl. 30-1) This invention relates to a cutting tool and, in particular, this invention relates to a cutting tool for use in the construction industry.

In the construction industry it is often necessary to pour a vertical concrete column which is anchored at the bottom in a base of concrete. This is done by placing a group of vertical reinforcing rods in the poured base while it is still soft and, after the concrete base has hardened, by placing a cylindrically-shaped container for concrete over the rods and pouring concrete into said container. i ter the concrete hardens, the container is removed from the finished concrete column.

It has been found that containers of cardboard which are disposable are most economical; however, after the concrete column has dried, it requires much eliort and labor to peel the cardboard container from the concrete column.

Specifically, this invention relates to a tool for removing cardboard containers from poured concrete columns,

whereby said containers can be quickly and easily re-' moved with a minimum amount of waste and inconvenience.

Accordingly, it is an object of this invention to provide a cutting tool for removing cardboard containers from poured concrete columns.

It is a further obiector this invention to provide a cutting tool for removing cardboard containers from poured concrete columns which may be used by a workman irrespective oi the diameter or shape of said column.

it isalso an object 05 this invention to provide a device of the type described hereinafter which is strong and durable, relatively inexpensive to manufacture, and otherwise well adapted for the purposes for which the same is intended,

in accordance with these and other objects which will become apparent hereinafter, the instant invention will now be described with reference to the accompanying drawings illustrating a preferred embodiment thereof.

in the drawings: I

FIG. 1 is a pictorial view of a construction site having a poured concrete base upon which there is going to be erected a poured concrete column;

FIG. 2 is a pictorial View of the tool; and

PEG. 3 is a pictorial view of said tool looking in the direction of the arrow designated 3 in FIG. 2.

Referriru more particularly to the drawings, wherein like reference characters designate like or corresponding parts throughout the different views, and referring particularly to FIG. 1, 11 designates generally a poured concrete slab into which there have been forced, while the concrete slab is still soft, vertically-aligned reinforcing rods 12, 13 and i i. A container of cardboard 36, which is cylindrically shaped, is placed over said verticallyaligned reinforcing rods. Into the container 15 there is poured a batch of concrete designated 17 which flows down and around said reinforcing reds binding the column and the base into a unitary structure.

Referring to FIG. 2, there is generally designated as 3 a tool comprising a handle 19 provided with grips afiixed to the other end thereof, said other end being designated with the numeral 23. The sharp-cutting member comprising 1) a downwardly extending blade, the charge edge 22 of which, in assembly, is disposed in longitudinal alignment with said handle and departs downits:

wardly and forwardly therefrom, and 2) a transverse chisel'blade 2 extending downwardly from the end 23 of said handle. Thernember is provided in the top surface 26 or" the transverse chisel blade 24 with a notch 27 for receiving the end 23 of the handle such that the handle overlays and is normally in abuttingengagement with the top of the longitudinally extendingblade. The bottom surface 28 of the chisel comprises a transverse cutting edge, said chisel being formed with an abutting surface 31 having a shape which coincides with the shape t the column on w h there is a container to be removed. A hammer block 32 is affixed by a screw 33, or other suitable means, to the top of the handle 19.

in operation, once the concrete 1'7 hardens within the container the next step is to remove said container. The tool is used by placing the transverse edge 28' between the container 16 and the concrete 17' and pounding on the handle or hammer block 32 with a hammer drivi-"i' the chisel downwardly between the cardboard con- L er and the poured concrete, whereby as the chisel and cutting tool travel downwardly, the sharp edge 22 cuts a slice through the thicknessof the. container along the length thereof While the edge 28 peels a strip on either side of the slice from the concrete column. When the chisel has traveled the length or" the cardboard container, it is removed and the cardboard container is then peeled off of the column. It has been found that the cardboard container comes all in substantially one piece whereby a great amount of labor is saved in contrast to former means of removing said cardboard containers which required that numerous small pieces of cardboard be discarded.

A chisel having a surface 31 which. conforms to the type and contour of the column being poured may be selected and the handle end 23 positioned in the notch 2'7 whereby the handle may be provided with the particu-ar shape of chisel required to do any contour of column found in construction, the end 23 being received in the notch 2? in tight relation with the sides and bottom of the notch and with the bottom or" the handle overlaying the top of the blade having the edge 22.

While the instant invention has been shown and described herein in what is conceived to be the most prac tical and preferred embodiment, it is recognized that departures may be made therefrom within the scope of the invention, which is therefore not to be limited to the details disclosed herein but is to be accorded the full scope of the claims so as to embrace any and all equivalent apparatus and articles.

What is claimed is:

l. A tool for removing cardboard containers from poured concrete columns comprising; a longitudinal, relatively slender handle having top, bottom and side surfaces and a first end and a second end, said handle having a rectangular cross-sectional area and provided with a series of aligned threaded holes in the side surface near said first end and provided with a threaded first hole in said top surface disposed adjacent said second end; a hamrner block provided with a threaded second hole centrally disposed therein, said hole being countersunk and normally in alignment with said first hole; a threaded bolt threadably received in said first and second hole maintaining said hammer block in abutting engagement with the top surface of said handle; a pair of grips having a series of bores therein and being provided with a convex surface and a fiat surface, said grips being mounted to the side surfaces of said handle with said fiat surfaces abutting said side surfaces and being co-extensive therewith; a series of threaded screws received in said series of aligned threaded holes and said series of bores; a chisel comprising a curved metal plate having a top edge, a beveled bottom edge and beveled side edges, said top edge having a notch therein for receiving said second end therein in tight engagement, said beveled edges being disposed with the sharpest portions thereof extending away from said second end, and said top edge lying in the same plane as the top surface of said handle; and a razor sharp longitudinal cutting edge having a thickened top surface in abutting engagement with the bottom surface of said ha idle and aligned with the center line thereof, said cutting edge being integral with said chisel, with the sharp edge departing downwardly from the top surface thereof and extending to the beveled bottom edge of said chisel whereby when hammer blows are made upon said hammer block, said cutting edge will slice said cardboard container as it travels downwardly with said bottom beveled edge is positioned between said container and said column.

2. A tool for removing forming containers from poured concrete columns comprising; a rigid longitudinal handle adapted to be disposed in a horizontal plane in use; and a cutting member comprising; a transverse downwardly extending chisel having a sharp substantially transverse bottom edge below the main plane of the handle and having a central notch in the top edge thereof; and a longitudinal downwardly extending blade integral with said chisel, said blade having a longitudinal cutting edge extending from the juncture with the chisel upwardly and rearwardly to the handle; said cutting member being afiixed to an end of the handle with the end of the handle being received in tight relation in the notch.

3. A tool for removing forming containers from poured concrete columns as set forth in claim 2, wherein the handle has a hammer block fastened thereto adjacent the notch of the cutting member, said block projecting outwardly from the sides of the handle.

4. A tool for removing cardboard containers from poured concrete columns, comprising;

a rigid longitudinal handle, and a chisel, said handle having a top, and a bottom and a first and second end, said'chisel and handle being rigidly fastened together with the chisel being disposed at the first end of the handle in right-angular relation to the longitudinal center line of the handle,

said chisel including a pair of blades extending downwardly below the bottom of the handle,

said blades having sharpened distal edges arranged in rigid right-angular T-shaped relation to one another,

one of the blades extending transversely below the first end with its sharpened edge extending in both directions a substantially equal distance transversely with respect to the longitudinal center line of the handle,

and the other of the blades being disposed longitudinally with respect to the handle and medially with respect to the said transverse blade with the distal edges extending rearwardly and upwardly toward the second end of the handle,

said handle having an upper surface at a point on the top of the hammer adjacent the first end to pound upon with a hammer to drive the chisel down the length of a cardboard container enclosing a poured concrete column to simultaneously peel a portion of the container from the concrete with the transverse blade and to slice medially the peeled portion of the container with the longitudinal blade,

whereby the container is prepared for removal from the concrete.

5. A tool as set forth as in claim 4, wherein the said,

one of the blades extending transversely with respect to the center line of the handle is curved in a transverse direction.

References Cited in the file of this patent UNITED STATES PATENTS 

2. A TOOL FOR REMOVING FORMING CONTAINERS FROM POURED CONCRETE COLUMNS COMPRISING; A RIGID LONGITUDINAL HANDLE ADAPTED TO BE DISPOSED IN A HORIZONTAL PLANE IN USE; AND A CUTTING MEMBER COMPRISING; A TRANSVERSE DOWNWARDLY EXTENDING CHISEL HAVING A SHARP SUBSTANTIALLY TRANSVERSE BOTTOM EDGE BELOW THE MAIN PLANE OF THE HANDLE AND HAVING A CENTRAL NOTCH IN THE TOP EDGE THEREOF; AND A LONGITUDINAL DOWNWARDLY EXTENDING BLADE INTEGRAL WITH SAID CHISEL, SAID BLADE HAVING A LONGITUDINAL CUTTING EDGE EXTENDING FROM THE JUNCTURE WITH THE CHISEL UPWARDLY AND REARWARDLY TO THE HANDLE; SAID CUTTING MEMBER BEING AFFIXED TO AN END OF THE HANDLE WITH THE END OF THE HANDLE BEING RECEIVED IN TIGHT RELATION IN THE NOTCH. 